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🧷 문제 링크
https://www.acmicpc.net/problem/1253
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
어떤 수가 다른 수 두 개의 합으로 나타낼 수 있으면 좋다 수임 -> N개의 수가 주어지면 그 중 좋은 수의 개수는 몇 개인가?
🔍 풀이 방법
시간복잡도상$O(N^{2})$ 로 처리해야 한다.
첫 for문에선 판별할 수를 결정하고 나머지 two pointer로 찾는다.
⏳ 회고
오랜만에 쉬운 문제 좋다.